Treadle-hammer.



W. BLACKER.

TREADLE HAMMER. APPLICATION FILED FEB. 19. 191s.

Patented Mar. 25,1919.

2 SHEETS-SHEET l. l

W. BLACKER.

TREADLE HAMMER.

APPLICATION FILED IEB. I9. IsIa.

Patented Mar. 25,1919.

2 SHEETS-SHEET 2- 'III II :III

IlI

l a subject of the King WILLIAM BLACKER, OF STALEYBRIDG-E, ENGLAND.

TREADLE-HAMMER.

Specication of Letters Patent.

Patented Mar. 25, 1919.

Application led February 19, 1918; Serial No. 218,051.

To all lwhom t may concern Beit known that I, IVILL'IAM BLAGKER, of Great Britain and Ireland, residing at 62 Stocks Lane, Staleybridge, in the county of Lancaster, England, engineer, have invented new and useful Improved Treadle-Hammers, of which the following is a specification.

This invention relates to an improved treadle hammer and in particular to'that type of hammer in which the head is swung on parallel arms or their equivalent.

The attached drawings show the improved treadle hammer.

In the said drawings f Figure l is a side elevation of thehanimer. f"

Fig. 1a is a fragmentary detail view'sliowing the connection between one end of the rail d and one of the tubes c.

Fig. :2 is a detail plan view.

Fig. 3 shows a front elevation omitting certain of the parts.

I make use of suitable end standards a, a, which are attached to the base 6, or otherwise supported, and such end standards are suitably stayed the requisite distance apart as for example by stays b, b. A treadle device is ,combined with the base casting, or otherwise sustained, and same may consist of a bent tube c fulcrumed at o, c on either side of said base b around the front of the hammer and clear of the anvil or block.

Across this treadle, extends a rail cl which may be round or of other cross section, and same is firmly attached at each extremity to the tube member of the treadle c by U.bolts and nuts fl (see the detail view Fig. la), or other means.

The end standards a, a, are bored and if necessary bushed or otherwise prepared to receive a slidable frame which may consist of a number of horizontal shafts or rods, as for example three shafts or rods e, e', e2 which are of greater lengththan the distance between the end standards. The shafts or rods e, e', e2 are sustained or carried by end bars or uprights f f a connecnection being effected by nuts or other means. A transverse steel or other bar g is also built up in the frame and this is provided with teeth g over a portion of its length. The shafts or rods e, e', c2 are conveniently round in cross-section so as to slide easily through the end standards and passing Y link 7c), is

and to turn in the stout uprights f f, and the complete frame is moved left or right as required by means of a spur pinion g2 gearing with the rack teeth, said spur pinion g2 being supported in brackets g3 bolted to the frame. Any other form of gear mechanism may be used for traversing the frame. Upon the two upper. horizontal shafts or rods I mount the parallel arms, and, where two parallel arms such as it, la only are employed one is arranged in connection with each shaft or rod. The manner of attaching the parallel arms may be greatly varied, as for example the tapered extremities may fit tapered holes in enlargements formed on the shafts, the arms being keyed in place; or bored sleeves such as h2, its, maybe iitted 011 the shafts and the tapered or shaped ends of the arms may be held in place by keys or otherwise. These bored sleeves are firmly pinned on the shafts e, e as shown by Fig. l. In connection with the lowerA parallel arm t, or more conveniently with the supporting sleeve h3, I form a bracket or jaws 7b4, h4, or other preparation, and such brackets or bored, and jointed thereto at h5, is a pendent bar or rod the rsame having a suitable bored head or stop collar z". A coiled spring j surrounds this pendent bar or rod The lower extremity of the pendent bar or rod passes through, a small bored rocking plate or swivel abutment 2 having trunnions 3, 3, which rocking plate or abutment is accommodatingly carried by two small levers or brackets 4, z'4A keyed or attached. to the third or lower shaft or rod e2. As thus, the coiled spring j lies disposed and confined between the head or stop collar and the rocking plate or swivel abutment 2, and its function isto returnor elevate the hammer head and to maintain same in raised position. I may vary the manner of holding the lower extremity of the pendent bar or rod.

Jointed to the lower parallel arm, or to some suitable attachment in connection therewith (as for example to the pivoted an adjustable connecting rod Z which terminates in a bracket Z or the like supporting a bowl or runner Z2 which engages below the treadle rail d, such connecting rod device Z eifecting the swinging of the hammer head when the treadle is worked.

The entire traveling frame e, e', e2, g, f, f can be'adjusted laterally so as to place the jaws are '.the elevated positionof the hammer hammer head at any position over the anvil, by simply working the rack and pinion gear, or the mechanism. used in lieu thereof.

In order not to interfere with the strength of the blow or the are through which the head is swung according as the depth or size of the work on the anvil varies` mechanism is provided whereby `the hammer head can be raised or lowered from a mean position (or raised from the` lowest position) and such mechanism takes the `form of `devices ,which act on the coiled spring. :.By way of example, I may mount a crank or arinm on the third or lower shaft orI rod e2 which crank or arm when moved` up, would (if the bar or rod i were immovably held) act to bring about compression of the coiled spring j, and so the hammer head is raised. Such crank or arm on. can be acted on by a connecting rod or link n jointed to a control lever 0 fulcrumed `at 0 on one of the upright bars f of the frame, and such control lever 0 carries a spring pressed detent or locking appliance o2 fulcrumed at o3 and capable of engaging a toothed quadrant p or equivalent device lixed alsofto the upright bar or otherwise carried. The locking detent 02 is easily withdrawn by actingfon the guided rod or spindle 04 as is clear from an inspect-ion of the detail plan Fig. 2.

From the foregoing, it is obvious that the sliding frame e, e, e2, g, f, f, may be easily and quickly traversed to bring the hammer head to any position over the anvil and that head can be regulated or adjusted as required by the mere movement of the control lever o, and the setting secured. As thehammer head is swung by acting on the treadle c the shafts e, e turn or rotate slightly as required.

In the matter of mere constructional detail I may make considerable variation and I might if desired use more than oney coiled Copies of this patent may be obtained for said frame,

controlling spring making suitable modifications to that end.

A l declare that what I claim is.

l. A treadle hammer having a head, parallel arms for said head, a sliding frame carrying the parallel arms, a traversing device hammer head adjusting means carried on Asaid sliding frame, locking means therefor, a foot treadle and a connection to work the `parallel arms asset forth.

:A treadle, hammer, having a sliding` frame, parallel swing arms.mountedthereon, a centralhammer raising rod, a. spring device in connection therewith, means to work such hammer raising rod, and hammer adjusting mechanism 4carried on the sliding frame and means to lock suoli hammer adjusting mechanism for the purpose Vdescribed.

3. `A ytreadle hammer comprising a frame, parallel arms pivoted to said frame, a hammer head carried bysaid arms, a foot treadle operatively connected to said arms, a second frame slidable on the irst frame, a bar con nected to said armsa spring surrounding said bar and acting on said arms, and means foradjusting the tension of said spring to vary the normal position of said arms.

4. A treadle hammer comprising a frame, parallel armspivoted to said frame, a hammer head carriedby said arms, a foot treadle operatively connected toL saidl arms, a second frame slidable onthe iirst frame, a bar connected to said arms, a spring `surrounding said bar and acting on said arms, a quadrant rack mounted on ythe first frame, a lever operatively connected to said spring for adjusting its tension, said lever and 4engageazble with said rack for locking said lever in adjusted position.

`In testimony whereof I have signed my name to this specification.

XVILLIAM BLACKER.

Washington,l D. C.

and a pawl carried by 

